Historical Gripe

As someone who is very interested in Historical Photography, can I say how dismayed I was when visiting Lacock Abbey some years ago, to find that in the basement there was a large sign stating that part of Harry Potter was filmed here. William Henry Fox Talbot used this space as his darkroom, but there was no mention of this. What is the world coming to? Can others give examples of similar perplexity?

Surely there is some mention of William Henry Fox Talbot at the site isn't there? That would be crazy if there is no mention.

Not a gripe, but a interest in seeing more documentation - I've been collecting GPS location data for the sites Walker Evans photographed in my area (northern W.Va.) and would like to see some sort of markers. I'm thinking maybe just small disks set into the sidewalk or something of that sort.